Lock-washer



F. LTRUMPOUR.

vLocx. WASHER. APPLICATION FILED IUNEAZS. i919- 1,368,201. Patented Feb.s, 1921.

' Snowdon tlhtlTlD STATES FREDERICK J. TRUIVIPO'UR, 0F WASHINGTON,DSTRICT OF COLUMBIA.

LO G1K-WASHER.

neeaaoi.

Application led .Tune 25, 1919.

Specification of Letters Patent.

Patented Feb. 8, 1921.

Serial No. 306,752.

(FILED UNDER THE ACT 0F MARCH 3, 1883, 22 STAT. L., 625.)y

To all whom t may concern:

Be it known that l, FREDERICK J. TRUM- ronn, a citizen ot' the UnitedStates, and a resident of llashington, District ot Columbia, haveinvented an Improvement in Lockllashers, of which the following is aspecilication.

rlhe invention described herein may be used by the Government, or any ofits otlicers or employees in prosecution ot worl; for the Government, orby any other person in the United States, without payment of any royaltythereon.

My invention is an improved lock washer, that is to say, a washeradapted to be litted upon a shaft, axle or other structure and whi hwill have means engaging said structure for locking the washer inposition and permitting the detachment ot the washer when foundnecessary and desirable.

@ne object of my invention is the provision oi. a device oft thecharacter stated which will prove particularly desirable for use uponthe shafts or axles of trucks and other vehicles, where it is necessaryto have a lock washer capable o instant application or removal, andwhilh cannot possibly become accidentally detached under the most severewear or strain.

Another object of my invention, is the provision of a loclr washer whoseconstituent elements are entirely carried by the washer and cannotbecome detached therefrom under any condition and whifh will permitinstant operation of its parts in the functions oit' application to anddetachment from the shaft or axle.

Another. object of my invention, is the provision ot a lock washer,which will be composed of few parts insuring simplicity, durability, andinexpensiveness ot production and which under all conditions of servicewill prove highly etlicient and practical.

lli/lith these objects in view the invention broadly stated consists oia washer having an opening' to receive a shaft or aXle, a lockinn` lreymounted in said washer and adapted to have locking engagement with saidaxle or shaft7 and means tor locking the key to properly secure thewasher upon the axle or shaft as well as locking the washer in position.

'lf he invention further consists o a lock Washer embodying noveldetails of construction and combination of parts for servicesubstantially as shown, described and particularly defined anddistinguished bythe claim.

In order that the construction in detail and the operation of my lockwasher may be understood, and the advantages accruing from myimprovements may be appreciated, l have illustrated in the accompanyingdrawing a lock washer construction embbdying my invention, suchillustrated construction, being capable of changes or modiicationswithin the scope ot the claim, and in said drawing Figure l is a trentelevation of a lock washer construfted in accordance with my invention,the parts being shown in the position they occupy when the washer islocked upon a shaft or aide; and

Fig. 2 is a side view or elevation of the complete lock washer with theparts shown in locked position.

The aim of this invention is to produce a lock washer composed ot the'fewest possible number ot parts and such device consists ot the washerl, provided with the boss or proje'tion 2, said boss and washer havingan opening 2 to receive the axle or shaft not shown, in connection withwhich the washer is to be used. The boss is provided with a passage 3.for the reception of the lockingkey, l, retained in the boss by means otthe fhannel, 5, engaged by the inner end of the pin, 6, whose outer headportion, 7, is confined and secured by the bent lip, 8, and to the upperbiturcated end, 9. ot the locking; key is pivoted, by means of the pin,l0, the curved locking spring, 11, whose free eind is adapted to passthrough an aperture, l2, ot the locking pin and thus` as clearly shownin the drawing, lock the key in position and positively preventaccidental detachment thereof.

ln applying my lock washer, the spring hey-locking member is released.the li'ey is raised to clear the opening: in the washer and in thiscondition, the washer is plafed upon the shatt or axle, and when theusual opening in the shaft or aille, not shown. is in line with thepassage in theV washer, the key is permitted to pass through suchopening and passage ot' the axle and washer and seats on the boss asshown, and in this position the spring key-locking member is forced intoengagement with the aperture, 12, of the key, locking the key andabsolutely preventing accidental movement of said key or detachment ofthe Washer Jfrom the axle or shaft, thus insuring a lock Washer capableof quick application or detachment; which forms a positive and reliablelock upon the axle or shaft for retaining a Wheel or other element uponsaid axle or shaft, and which lock Washer embodies a cheap, eiiicientand entirely practical device for any purpose Where such a Washer wouldfulll its functions.

I claim A lock Washer, including a Washer formed with a boss andprovided with a passage through the boss, a key formed for insertion inthe passage, said key having a bifurcated head at one end and providedwith an aperture adjacent its other end, a curved locking member pivotedin the bifurcatedY head and adapted to partially encircle the boss andpass through the aperture of the key to lock the key in place.

FREDERICK J. TRUMPOUR.

